/*
 * Copyright 2010 Gal Dolber.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.unnison.framework.rebind.binder.contributor;

import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.user.rebind.StringSourceWriter;

import com.unnison.framework.client.binder.contributor.UserAction;
import com.unnison.framework.client.binder.useraction.Category;
import com.unnison.framework.client.binder.useraction.HasUserActionValue;
import com.unnison.framework.client.binder.useraction.event.UserActionEvent;
import com.unnison.framework.rebind.binder.BinderContext;
import com.unnison.framework.rebind.binder.BinderContributor;

public class UserActionContributor implements BinderContributor {

    @Override
    public void contribute(BinderContext binderContext, TreeLogger logger, GeneratorContext context) throws UnableToCompleteException {
        String userAction = binderContext.getMethod().getAnnotation(UserAction.class).value();

        StringSourceWriter writer = new StringSourceWriter();
        String component;
        JClassType presenterType = binderContext.getPresenterType();
        if (presenterType.isAnnotationPresent(Category.class)) {
            component = presenterType.getAnnotation(Category.class).value();
        } else {
            component = presenterType.getQualifiedSourceName();
        }

        writer.print("eventBus.fireEvent(new " + UserActionEvent.class.getCanonicalName() + "(\"" + component + "\", \"" + userAction
            + "\"");

        JClassType hasUserAction = context.getTypeOracle().findType(HasUserActionValue.class.getCanonicalName());
        if (!presenterType.isAssignableTo(hasUserAction)) {
            writer.println("));");
        } else {
            writer.println(", presenter.getUserActionText(), presenter.getUserActionNumber()));");
        }
        binderContext.addAfterHandler(writer);
    }

    @Override
    public String name() {
        return "UserAction";
    }
}
